<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    .box {
      width: 500px;
      height: 320px;
      display: flex;
      flex-direction: column;
      margin: 50px auto;
      border: 3px solid #333;
    }

    .box > ul {
      height: 60px;
      display: flex;
    }

    .box > ul > li {
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
      font-size: 30px;
      color: #fff;
      background-color: skyblue;
      cursor: pointer;
    }

    .box > ul > li.active {
      background-color: orange;
    }

    .box > ol {
      flex: 1;
      position: relative;
    }

    .box > ol > li {
      width: 100%;
      height: 100%;
      background-color: purple;
      font-size: 50px;
      color: #fff;
      position: absolute;
      left: 0;
      top: 0;
      display: none;
    }

    .box > ol > li.active {
      display: block;
    }
  </style>
</head>
<body>

  <div class="box" id="box1">
    <ul>
      <li class="active">1</li>
      <li>2</li>
      <li>3</li>
    </ul>
    <ol>
      <li class="active">1</li>
      <li>2</li>
      <li>3</li>
    </ol>
  </div>


  <div class="box" id="box2">
    <ul>
      <li class="active">1</li>
      <li>2</li>
      <li>3</li>
    </ul>
    <ol>
      <li class="active">1</li>
      <li>2</li>
      <li>3</li>
    </ol>
  </div>

  <div class="box" id="box3">
    <ul>
      <li class="active">1</li>
      <li>2</li>
      <li>3</li>
    </ul>
    <ol>
      <li class="active">1</li>
      <li>2</li>
      <li>3</li>
    </ol>
  </div>


  <div class="box" id="box4">
    <ul>
      <li class="active">1</li>
      <li>2</li>
      <li>3</li>
      <li>4</li>
      <li>5</li>

    </ul>
    <ol>
      <li class="active">1</li>
      <li>2</li>
      <li>3</li>
      <li>4</li>
      <li>5</li>

    </ol>
  </div>

 <!-- <script src="./tab1.js"></script> -->
 <script src="./tab3.js"></script>
<script>
    var obj1 = new Tabs('#box1');
    var obj2 = new Tabs('#box2',{type:'mouseover'});
    var obj3 = new Tabs('#box3');
    var obj4 = new Tabs('#box4');

</script>
  </body>

  </html>
